JPS6048267B2 - Pulling straightening device in continuous casting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for drawing and straightening continuously manufactured slabs in a continuous casting machine.

In known continuous casting machines, billets and slabs are cast using separate dedicated machines, but it is extremely difficult to install two dedicated machines in a foundry to handle these two different slabs. This is uneconomical, and there is a need for a common continuous casting machine that can perform double-row billet casting and individual slab casting using a single continuous casting machine. The problem here is that in the case of billet double-row casting, each drawing speed is different, so the current roll structure drawing straightening device cannot be used as is. The purpose of this is to make the driving side roll and the pressing side roll in the conventional pulling straightening device into two separate rolls, so that the driving side split roll can be driven independently and the two can be connected to each other by clutch operation. By providing a drawing straightening device configured as follows, it is possible to cast two rows of billets,
The purpose of the present invention is to make it possible to manufacture a continuous casting machine that can perform slab individual casting.

Embodiments of the present invention will be described below with reference to the drawings.

1a and lb are lower rolls with a two-part structure, and 2a and 2 are upper rolls with a two-part structure.

Both ends of the lower rolls 1a and lb are rotatably supported by a main body frame 4 by bearings 3 arranged on the same axis, respectively.
Each roll shaft is independently driven by interlocking with a motor 7 via a gear reduction frame structure 6 that meshes with a gear 5 fitted to each roll shaft. Further, they are connected to each other by engagement of a clutch 9 provided on a connecting shaft 8, so that they can rotate as a unit. The upper rolls 2a and 2b are each supported at both ends by bearings 11 fixed to the upper roll frame 10, and the upper roll frame 10 is supported by a bracket 12 fixed to the main body frame 4 with links forming a parallel link mechanism. 13 and a lever 14, the other end of the lever 14 is movably supported on the main body frame 4.
The roll surfaces of the upper rolls are moved up and down in parallel by the pushing and pulling operations of the cylinder 15, and press the slab 16 or 17 passing between the upper roll and the lower roll. The clutch 9 includes, for example, fixed teeth 20 that are engaged with the connecting shaft 8 and the output shaft 18 of the gear reduction mechanism 6 by an electromagnet 19, and fixed teeth 20 that are disengaged from the fixed teeth 20 in the second direction A in the drawing. A tooth type electromagnetic clutch is used, which has movable teeth 22 whose moving force is biased by a spring 21.
When the electromagnet 19 is not energized and the clutch is disengaged, the force of the spring 21 pushes the movable teeth 2'2 in the direction A and separates them from the fixed teeth 20, and the shafts 8 and 18 are uncoupled, and the lower rolls 1a, 1b are each driven independently. In addition, the electromagnet 19
When energized, the movable tooth 22 overcomes the force of the spring 21 and moves in the opposite direction B, the fixed tooth 20 and the movable tooth 22 mesh, the shafts 8 and 18 are connected together, and the lower rolls 1a,
1b are driven together. In the embodiment shown in the drawings, the slab pressing mechanism for the upper rolls 2a, 2b employs a parallel link mechanism operated by a cylinder 15. The present invention is not limited thereto, but may be carried out by suitable known technical means, for example, by guiding and holding an upper roll frame to the main body frame so as to be movable up and down, and by pushing out and pulling back a cylinder, the roll surface is operated in parallel. It is equally effective. With this configuration, during billet casting, the left and right lower rolls 1a, 1b are driven independently according to the degree of slab withdrawal, and the upper rolls 2a, 1b are driven in parallel depending on the thickness of the slab. 2b and the lower rolls 1a, 1b, and during slab casting, the clutch 9 is operated to move the billet 16 between the lower rolls 1a and 1b.
By connecting b and each other, both become integrally driven,
The drawing straightening of the slab 17 passing between the upper roll
perform an action.

As described above, the pulling straightening device according to the present invention can be easily used for billets or slabs by simply engaging and disengaging the clutch, so it can be used for two-row billet casting and individual slab casting. It is possible to manufacture a continuous casting machine for both purposes, and equipment costs can be greatly reduced.

[Brief explanation of the drawing]

FIG. 1 is a front view showing one embodiment of the present invention, and FIG. 2 is a half-cut sectional view of a tooth type electromagnetic clutch. 1a, 1b...lower roll, 2a, 2b...
...Upper roll, 4...Body frame, 5.
... Gear, 6 ... Gear reduction mechanism, 7 ・
...Motor, 8 ...Connection shaft, 9 ...
...Clutch, 10...Upper roll frame.

Claims (1)

[Claims] 1 The driving side roll and the pressing side roll in the drawing straightening device are each composed of two split rolls, and the driving side split roll is
Each roll is rotatably supported independently on the same axis on the main body frame, and a gear reduction mechanism driven by a separate motor that meshes with a gear provided on each roll shaft is connected to the drive-side split roll. 1. A drawing straightening device for a continuous casting machine, characterized in that the mechanism is provided so that it can be approached and separated by engaging and disengaging a clutch provided on a connecting shaft.